Uka, Genemo Berisa (2012) Remote Sensing and GIS Based Urban Sprawl Susceptibility Analysis: A Case Study of Shashamane Town, West Arsi Zone; Ethiopia. Masters thesis, Addis Ababa University.
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Abstract
In this paper, analysis was made on the urban sprawl susceptibility of the town of Shashamanne using remote sensing and GIS techniques. To quantify and measure the urban sprawl, an assessment was made on the extent and rate of land use/land cover (lulc) change using multi-temporal landsat images during 1986, 2000 and 2011 and Shannon’s entropy index. The supervised classification algorithm was employed to identify the major land use/land cover types in the study area and they were categorized into 4 types: agricultural lands, urban/built up areas, vegetated lands and bare fields. Being the focus was on the spatial extent of built up areas; the LULC maps were further simplified into built up and non-built up areas. With Shannon’s Entropy approach the degree of dispersion or concentration of built up area’s development or sprawl was described. Finally, to predict urban sprawl susceptibility of the study area the parameters such as land use/land cover during 2011, slope, population density and distances from major road axis and rivers were integrated using MCE function in ArcGIS. Results indicated that the study area has undergone a tremendous change in urban growth and pattern during the study period. Predominantly at the expense of agricultural lands and vegetated areas in the hinterlands, built-up area was increased from 1977 ha (in 1986) to 2677 ha (in 2000) and further rose to 4329 ha (in 2011). Shashamanne town was expected to have sprawl pattern types of ether linear/strip along highways, or expansion/cluster, or leapfrog as common to other urban centers in the world. However, in reality, the town has rather had irregular sprawl pattern type that is termed here as amoeboid shape. This is to mean that sprawl phenomenon in the study areas was of a variable irregular pattern showing the combination of the three sprawl patterns: linear/strip along highways, expansion/cluster and leapfrog. The analysis made on urban sprawl susceptibility revealed that, of the total area of the study site 1023 ha (8%), 5279 ha (41%) and 394 ha (3%) were respectively, highly, moderately and marginally susceptible to sprawling. This implies that large areas that are currently reserved as informal green spaces, fertile farming lands and other natural resources have been threatened.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Urban Sprawl susceptibility, GIS and Remote Sensing tools, LULC Change, Urban Sprawl Measurement, Shashamanne Town. |
| Subjects: | G Geography. Anthropology. Recreation > GF Human ecology. Anthropogeography Q Science > QE Geology |
| Divisions: | Africana |
| Depositing User: | Selom Ghislain |
| Date Deposited: | 12 Jul 2018 11:55 |
| Last Modified: | 12 Jul 2018 11:55 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/7428 |
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